Make ScriptStreamer and dependents Oilpan friendly.

Source/bindings/core/v8/ScriptDebugServer.h

Index: Source/bindings/core/v8/ScriptDebugServer.h
diff --git a/Source/bindings/core/v8/ScriptDebugServer.h b/Source/bindings/core/v8/ScriptDebugServer.h
index 61a35127e8567dbe2f1d60ccff68436494fd0295..5dc5ec752c0d020b8ee00e4ead3e8b8b064219ea 100644
--- a/Source/bindings/core/v8/ScriptDebugServer.h
+++ b/Source/bindings/core/v8/ScriptDebugServer.h
@@ -31,6 +31,7 @@
 #ifndef ScriptDebugServer_h
 #define ScriptDebugServer_h
 
+#include "bindings/core/v8/Nullable.h"
 #include "bindings/core/v8/ScopedPersistent.h"
 #include "core/inspector/ScriptBreakpoint.h"
 #include "core/inspector/ScriptCallStack.h"
@@ -48,9 +49,12 @@ class ScriptSourceCode;
 class ScriptValue;
 class JavaScriptCallFrame;
 
-class ScriptDebugServer {
+class ScriptDebugServer : public NoBaseWillBeGarbageCollectedFinalized<ScriptDebugServer> {
     WTF_MAKE_NONCOPYABLE(ScriptDebugServer);
 public:
+    virtual ~ScriptDebugServer();
+    virtual void trace(Visitor*);
+
     String setBreakpoint(const String& sourceID, const ScriptBreakpoint&, int* actualLineNumber, int* actualColumnNumber, bool interstatementLocation);
     void removeBreakpoint(const String& breakpointId);
     void clearBreakpoints();
@@ -104,7 +108,7 @@ public:
     virtual void runScript(ScriptState*, const String& scriptId, ScriptValue* result, bool* wasThrown, String* exceptionDetailsText, int* lineNumber, int* columnNumber, RefPtrWillBeRawPtr<ScriptCallStack>* stackTrace);
     virtual void setPreprocessorSource(const String&) { }
     virtual void preprocessBeforeCompile(const v8::Debug::EventDetails&) { }
-    virtual PassOwnPtr<ScriptSourceCode> preprocess(LocalFrame*, const ScriptSourceCode&);
+    virtual Nullable<ScriptSourceCode> preprocess(LocalFrame*, const ScriptSourceCode&);
     virtual String preprocessEventListener(LocalFrame*, const String& source, const String& url, const String& functionName);
     virtual void clearPreprocessor() { }
 
@@ -113,7 +117,6 @@ public:
 
 protected:
     explicit ScriptDebugServer(v8::Isolate*);
-    virtual ~ScriptDebugServer();
 
     virtual ScriptDebugListener* getDebugListenerForContext(v8::Handle<v8::Context>) = 0;
     virtual void runMessageLoopOnPause(v8::Handle<v8::Context>) = 0;